Porous polyimide/electrospinning polyimide fibrous composite material and application thereof
A polyimide fiber, polyimide technology, applied in the direction of fiber type, fiber processing, textile and papermaking, etc., to achieve the effect of improving capture and good application prospects
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Embodiment 1
[0022] In an ice-water bath at 0°C, add 4,4′-diaminodiphenyl ether and N,N′-dimethylformamide into the three-necked flask. After dissolving, add pyromellitic dianhydride in three times, two The reaction was stopped within 1 hour, and the solid content of the polyamic acid obtained was 20 wt%. Then add in DMF, under the condition of 0 ℃, dilute the original solution to a solid content of 12wt%, and carry out electrospinning with the obtained solution. Aluminum foil collectors collect the nanofibers. The distance from the spinneret to the collector is 15cm, and the injection rate is 0.25mL / h. Put the spun fiber membrane in an oven for half an hour to dry at 60, 100, 150, 200, 250, and 300°C for imidization, and set aside; add melamine and dimethyl sulfoxide to a three-necked flask respectively, and then Add pyromellitic dianhydride, after dissolving, heat up to 180°C in a nitrogen atmosphere for high-temperature polycondensation, react for 24 hours, stop heating until cooling,...
Embodiment 2
[0024] In an ice-water bath at 0°C, add 4,4′-diaminodiphenyl ether and N,N′-dimethylformamide into the three-necked flask. After dissolving, add pyromellitic dianhydride in three times, two The reaction was stopped within 1 hour, and the solid content of the obtained polyamic acid was 20 wt%. Then add in DMF, under the condition of 0 ℃, dilute the original solution to a solid content of 12wt%, and carry out electrospinning with the obtained solution. Aluminum foil collectors collect the nanofibers. The distance from the spinneret to the collector is 15cm, and the injection rate is 0.25mL / h. Put the spun fiber membrane in an oven for half an hour to dry at 60, 100, 150, 200, 250, and 300°C for imidization, and set aside; add melamine and dimethyl sulfoxide to a three-necked flask respectively, and then Add pyromellitic dianhydride, after dissolving, heat up to 180°C in a nitrogen atmosphere for high-temperature polycondensation, react for 24 hours, stop heating until cooling,...
Embodiment 3
[0026] In an ice-water bath at 0°C, add 4,4′-diaminodiphenyl ether and N,N′-dimethylformamide into the three-necked flask. After dissolving, add pyromellitic dianhydride in three times, two The reaction was stopped within 1 hour, and the solid content of the obtained polyamic acid was 20 wt%. Then add in DMF, under the condition of 0 ℃, dilute the original solution to a solid content of 12wt%, and carry out electrospinning with the obtained solution. Aluminum foil collectors collect the nanofibers. The distance from the spinneret to the collector is 15cm, and the injection rate is 0.25mL / h. Put the spun fiber membrane in an oven for half an hour to dry at 60, 100, 150, 200, 250, and 300°C for imidization, and set aside; add melamine and dimethyl sulfoxide to a three-necked flask respectively, and then Add pyromellitic dianhydride, after dissolving, heat up to 180°C in a nitrogen atmosphere for high-temperature polycondensation, react for 24 hours, stop heating until cooling,...
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